Schneider Electric SR2MAN01 user manual Discrete DISCR Outputs, Description, Contactor mode, i1 Q1

LD Language Elements

Discrete (DISCR) Outputs

Description	Discrete Outputs correspond to the smart relay output relay coils (connected to the
	actuators). These outputs are numbered from 1 to 9, then from A to G, according to
	the smart relay and any extensions.
	Any Discrete output can be used, in the program, indifferently either as a coil or a contact.

Use as a Coil To use a Discrete output as a coil, four modes are available:

zContactor mode,

zImpulse relay mode,

zLatch mode,

zUnlatch mode.

Contactor mode:

Symbol of a Discrete output, used as a coil in contactor mode:

[ Q-

The coil is energized if the contacts to which it is connected are conducting.

Otherwise it is not energized.

Impulse relay mode:

Symbol of a Discrete output, used as a coil in impulse relay mode:

Q-

Pulse energization, the coil changes state on each pulse it receives.

Example: Switching a lamp on and off with a pushbutton:

i1 Q1

A push button is connected to input I1 and a lamp to output Q1. Every time the button is pressed, the lamp switches on or off.

98 SR2MAN01 11/2007